Yong Tang b0c0884b1f Docker http panics caused by container deletion with empty names.
This fix tries to fix the http panics caused by container deletion
with empty names in #22210.

The issue was because when an empty string was passed, `GetByName()`
tried to access the first element of the name string without checking
the length. A length check has been added.

A test case for #22210 has been added.

This fix fixes #22210.

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Upstream-commit: 9d8071a74db20556d0fc1b6ef3270326b3583de9
Component: engine
2016-04-21 07:53:49 -07:00
S
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